The invention relates to compounds of the general formula ##STR00001## wherein either R signifies C.sub.1-C.sub.6-alkyl, halo-C.sub.1-C.sub.6-alkyl, C.sub.1-C.sub.6-alkoxy-C.sub.2-C.sub.6-alkyl or halo-C.sub.1-C.sub.6-alkoxy-halo-C.sub.2-C.sub.6-alkyl; and X.sub.1 signifies a single bond, O, S, S(O) or S(O).sub.2; or R signifies halogen and X.sub.1 signifies a single bond; X.sub.2 signifies CN, halogen, C.sub.1-C.sub.6-alkyl, halo-C.sub.1-C.sub.6-alkyl, C.sub.1-C.sub.6-alkoxy, halo-C.sub.1-C.sub.6-alkoxy, C.sub.1-C.sub.6-alkoxycarbonyl, C.sub.1-C.sub.6-alkylthio, C.sub.1-C.sub.6-alkylsulfinyl, C.sub.1-C.sub.6-alkylsulfonyl, C.sub.1-C.sub.6-alkylsulfonylamino, halo-C.sub.1-C.sub.6-alkylsulfonylamino, OH, NH.sub.2, COOH, CONH.sub.2, C.sub.1-C.sub.6-alkylaminocarbonyl or C.sub.1-C.sub.6-alkylcarboxamido, whereby if n is greater than 1, X.sub.2 may differ from each other; m signifies 1, 2, 3 or 4; and n is 1, 2, 3, 4 or 5, and optionally the enantiomers thereof. The active ingredients have advantageous pesticidal properties. They are especially suitable for controlling parasites on warm-blooded animals.